Forum Discussion
Failed to send emails to outlook/hotmail recipients, returns error 550 5.7.515
We are supporting vendor of a public service, the system sends email notifications to patrons every day. The volume is around 20000-25000 emails per day. Recently, our mail server got large amount of...
"Can we request Microsoft to add our domain in whitelist and allow us to send emails to notify our patrons? Any way to contact hotmail/outlook/live/msn postmaster?"
Answer: No, those are not customizable for DNS records. You could add this record to your SPF and that might help for some of the accounts. +include:spf.protection.outlook.com